Convex and Concave Lenses

Convex lenses are thicker in the middle and bend light rays inward, focusing them to a point. They are used in magnifying glasses and cameras. Concave lenses are thinner in the middle and bend light rays outward, spreading them apart. They create virtual images that appear smaller and are commonly found in glasses for nearsightedness. In geometrical optics, the shape of the lens determines how it manipulates light, impacting how images are formed and perceived. Both types play essential roles in various optical devices and applications.